body {
  margin: 0;
}

h1,
h2,
h3,
h4,
h5,
h6,
p {
  margin: 0;
  padding: 0;
  font-weight: normal;
}

div {
  box-sizing: border-box;
}

ul {
  padding: 0;
  margin: 0;
  list-style: none;
}

img {
  height: 100%;
}

a {
  text-decoration: none;
  color: #424242;
}

.book-hd .title {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 1;
  height: 44px;
  width: 100%;
  line-height: 44px;
  background-color: antiquewhite;
  text-align: center;
  color: #333;
}

.book-btn-group .scroll-top-btn,
.book-btn-group .auto-play-btn {
  display: block;
  position: fixed;
  right: 25px;
  width: 30px;
  height: 30px;
  line-height: 30px;
  font-size: 14px;
  font-weight: 500;
  text-align: center;
  border-radius: 50%;
  background-color: burlywood;
  opacity: 0.6;
}

.book-btn-group .scroll-top-btn:hover,
.book-btn-group .auto-play-btn:hover {
  opacity: 1;
}

.book-btn-group .scroll-top-btn {
  display: none;
  bottom: 65px;
}

.book-btn-group .auto-play-btn {
  display: none;
  bottom: 25px;
}
